This back-up ring is supplied in AS568-213 white PTFE (Teflon) 55 Shore D built to an inside diameter of 0.921 in (23.39 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.199 in (30.45 mm), catalogued under part number TST213SO. It bridges the extrusion gap so the primary seal holds its shape under load.
PTFE (Teflon) offers non-stick, non-contaminating surface characteristics and a very wide continuous service temperature range. The compound resists nearly all industrial chemicals, solvents, and steam. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service.
Maintenance and OEM teams specify it across semiconductor fabrication, pharmaceutical and biotech, and chemical processing.
Stocked as TST213SO and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description 213 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 0.921 inch (23.39 mm)
Actual Outside Diameter 1.199 inch (30.45 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings